Dishwashing machine



Feb. 4, 1936. ELKlNGTON 2,029,563

DISHWASHING MACHINE Filed Aug. 25, 1933 3 Sheets-Sheet l INVENTOR. J4Ms f ZZ/mverb/v BY 0 a v A I ORNEY Feb. 4, 1936. ELKlNGTON 2,029,563

DISHWASHING MACHINE Filed Aug. 23, 1933 3 Sheets-Sheet 2 IIIIIIIIIIIII/IIIII V I I I 35 I/ll lI/l/I/I/l/l/ll/ nnuunnm I TORNEY DISHWASHING MACHINE Filed Aug. 25, 1933 3 Sheets-Sheet 5 Q4 INVENTOR.

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ORNEY Patented Feb. 4, 1936 I g UNITED STATES PATENT OFFICE I DISHWASHING MACHINE James E. Elklngton, San Francisco, Calif.

Application August 23, 1933, Serial No. 686,431

1 Claim. (Cl. 198-221) This invention relates to dish washing macarries a tank 5, an electric motor I, and pump chines, and particularly to those in which cleans- 8, and an oscillating mechanism 9, the last two ingis accomplished by spraying fluid under presbeing driven by said motor. sure. The casing I comprises an enclosure having The object of my invention is to provide a dish two doors ll on opposite sides thereof, slidable washing machine including a casing, within which vertically in the slides l2. A horizontal tracka pair of spraying pipes are rotatably mounted way I3 is formed of angle bars I 4 extending from above and below the dishes to be cleansed, said one door to the other, and having their ends pipes being connected to a power driven pump, supported by the walls of the casing I. The and to means for oscillating said pipes back and trackway I3 serves as a'guide for dish racks 10 forth, to equalize the distribution of the fluid l5 which are passed thru the casing. spray over the dishes. A horizontally disposed spray pipe I6 is ar- Another object of my invention is to provide ranged near the top of the casing I above the means for simultaneous oscillation of the spraytrackway l3, and is connected by means of an ing pipes andintermittent advancing of the trays elbow l1 and a pipe l8 to a vertical pipe I9, loaded with dishes to be cleansed. placed adjacent the Wall of the casing. A similar Another object of my invention is to generally horizontally disposed spray pipe is arranged p y the dish Washing machine and make it below the bottom of the trackway l3 and is consuperior in point of efli'ciency and inexpensiveness nected by means of an elbow l1 and a pipe [8 20 of construction and operation. to the pipe I9, said pipe communicating with the 20 In this specificationand the annexed drawings, discharge side of the pump 8. the invention is illustrated in the form considered The upper spray pipe l6 directs the streams of to be the best, but it is to be understood that the suds or water downwardly, and the lower pipe 20 invention is not limited to such form, because it upwardly, against the dish rack I5 and against y be embodied in other forms; and i is so the dishes or articles in said carrier.

to be understood that in and by the claim folh b tt partiti n'22 f t casing ow the ption, it is desired to cover the tends horizontally through the length thereof and invention in whatsoever form it may be embodied. is inclined downwardly toward one side of the In the ac p y hr sheets f drawin casing. The partition 22 covers approximately 1 is a per pect ve V ew O y d h Was two thirds of the bottom and merges into a ver- 30 machine. tical wall 23 of the tank 5, the top of which is Fig. 2 is a plan section taken through Fig. 3 covered by separate drainer screen baskets 25 to on the line 22. facilitate the removal and cleansing thereof. Fig. 3 is a vertical cross section taken through One side of the baskets 25 rests on a supporting Fig. 2 on the line 33. bar 26 attached to the wall of the tank, and the 35 Fig. 4 is an enlarged plan view, partly in secother sideis supported by means of a margin 21 tion, of the spray pipe oscillating mechanism formed on the basket, on the bottom partition 22. taken on the l of 5. The fluid sprayed upon the dish racks l5 passes Fig. 5 is a vertical cross section taken through the strainers 25, leaving the unsoluble particles Fig; 4 on the line 55. and dirt thereon, and collects in the tank 5, 40

6 is a side elevation of the spray p p which is connected by a suitable conduit withthe partly shown in section. intake of the pump 8.

Fig. 7 is a cross section taken through Fig. 6 The motor 1 drives the oscillating mechanism on the line 6-6. 9 by means of a motor shaft 30 supported by a Fig. 8 is a plan view of a conveying mechanism bearing 3| arranged in a casing 32 of the mecha- 45 in a dish washing machine. nism 9. A worm 33 is aflixed on the shaft 30 Fig. 9 is a cross section taken through Fig. 8 and meshes with a worm gear 35 carried by and on the line 9--9. v rotating with a shaft 36, which is rotatably sup- Fig. 10 is a side elevation of a dog employed ported by the casing 32 and a cover 31. The gear in connection with my conveying mechanism. 35 carries an eccentric 39, which is confined with- 50 Fig. 11 is a plan view of an overload release in a yoke 40 adapted to move about a shaft 4|, mechanism, partly shown in section. to which said yoke is secured. The compara- Ihe dish washing machine of my design comt1vely slow rotation of the gear 35 causes the ecprises a casing I supported by four standards or centric 39 to impart oscillating motion to'the legs 2. A platform 3 is attached to said legs and yoke and its associated vertically disposed shaft 5.

4|. The shaft 4! is rotatably supported by the casing 32 and the cover 97 and is extended through a fluid tight bearing 42 in the partition 22 to protect the oscillating mechanism 9 and the motor 1 from water leakage in the casing I. The shaft 4| extends upward through the casing l and is journaled in a bearing 45 at the top thereof. The shaft 4| carries the arms 41 and 49, in spaced relation thereon.

Both arms 41 and 49 carry identical mechanisms for the purpose of oscillating the spray pipes l6 and 20 respectively, and a description of but one will be made. Each arm has an adjustable link universally attached thereto, said link 69 having its other end attached to the respective spray pipes.

Each of the spray pipes l6 and 20 consists of two separate tubes having spray nozzles 66 longitudinally spaced on one side thereof. The

nozzles 56 are in alignment and are elongated to produce fiat overlapping jets of fluid. The cylindrical portion 59 of the elbows I! and I1 is interposed between the nozzle tubes 66 and is kept in alignment therewith by means of two rings 59 placed over the abutting ends thereof. The rings 69 are rotatable on the portion 69 but are aflixed to the nozzle tubes 55 by means of screws 60. Integral with the rings 59 are the ears 62 to carry a shaft 64. The shaft 64 has its center section between the ears 62, of larger diameter than the opposite end sections 66, to maintain the rings 69 in predetermined spaced relation on, but to allow a free rotation of said rings about the portion 69. Nuts 61, screwed onto the opposite threaded ends 66 securely lock the ears 62 to the shaft.

The shaft 64 carries a sleeve 61' which has as an integral part thereof, a stub-shaft 69. The latter serves as a pivot for attachment of the other end of the link 69. The upper part of the stub-shaft 69 is threaded to receive a nut III for holding the link 60 in place. The oscillating movement of the shaft 4|, through the levers 41 and 46 and associated therewith links 50, is therefore imparted to the spray pipes l6 and 20.

The dishes or other articles to be washed are placed into the dish racks and the latter are moved into the casing l. The doors H are slid down and the motor I started. The latter drives the pump 9, which sends the fluid up the pipe l9 to the spray tubes l6 and 20. The oscillating mechanism rocks said spray tubes and the fluid forced from the nozzles 66 is thereby directed and spread over the dishes. fluid is such that it washes of! the dishes.

The pressure of the all the dirt and waste In dish washing machines of a larger size, I provide an automatic conveying means for the dish carriers, which is shown in detail in Figs. 8 to 11. It comprises a trackway 16 formed of angle bars 16 supported by brackets 11 which are afllxed to the walls of the casing I.

The brackets I1 also support a pair of bars 19 adapted to slide back and forth upon bracket extensions Ill. The bars 19 carry sets of dogs 9| adapted to engage tooth racks 92 attached to the bottom of the dish racks l6. The mechanism which I employ to actuate the bars 16 consists of a lever 64 which is an integral part or a lever 48 adapted to oscillate the spray pipe and is aflixed to the oscillating shaft 4|. The lever 94 carries a link 85, the other end of which is connected to the overload release mechanism 81. The latter consists of a hollow casing 90. having an open end 9|, on both sides of which half-circular grooves 92 are formed. A member 93, having cylindrical portions 94 resting in said grooves 92, is yieldingly urged against the casing by a spring 96, one end of which is afflxed to the member 93 and the other to the afiusting bolt 91. The casing 99 is affixed to a cross-bar 99 which. with a bar 99, keeps the bars 19 in spaced relation.

The reciprocating motion of the bars I9 operates the dogs 9| and moves the dish carriers IS in a direction to the discharge door of the casing.

When a dish rack jams to cause an overload on the motor, the member 93 of the overload release mechanism 91 swings about the cylindrical portions 94 as pivotal points, and the reciprocal motion of the bars 19, and consequently the advance of the dish carriers l6. ceases.

Having thus described this invention, what I claim and desire to secure by Letters Patent is:

In a dishwashing machine, a casing; parallel tracks arranged lengthwise of said casing for supporting dish racks thereon; guides beneath each of said tracks; a slide in each guide beneath each track, each slide being held in its respective guide by the overlying track; both sides being held together in fixed relation, being movable in unison on a fixed horizontal plane and in a longitudinal direction relative to the tracks; dogs pivotaily mounted on the sides of said slides at spaced points thruout the length thereof, said dogs being movable above and below the horizontal plane of the tracks to engage and disengage the dish racks on said tracks in accordance with the movement of the slides.

JAMES E. ELKINGTON. 

